Metal hose adopting double-layer film covering design

Abstract

The utility model relates to a metal hose adopting a double-layer film covering design, which belongs to the technical field of metal hoses and comprises a corrugated pipe, an inner-layer heat-shrinkable pipe is arranged on the outer side of the corrugated pipe, the inner-layer heat-shrinkable pipe and the corrugated pipe are adhered and attached, the inner-layer heat-shrinkable pipe is made of hot melt adhesive materials, two sides of the corrugated pipe are connected with transition joints through the inner-layer heat-shrinkable pipe, and the inner-layer heat-shrinkable pipe is connected with the inner-layer heat-shrinkable pipe. And a woven mesh sleeve is arranged on the outer side of the corrugated pipe. The metal hose has the advantages that the overall insulation flame retardant performance of the metal hose can be improved through the outer layer heat shrink tube made of polyolefin, mechanical strain can be buffered through the inner layer heat shrink tube made of hot melt adhesive, the metal hose can be completely adhered and attached to the corrugated pipe, the sealing performance is high, the inner layer heat shrink tube is used in cooperation with the outer layer heat shrink tube, and the service life of the metal hose is prolonged. And the inner-layer heat shrink tube and the outer-layer heat shrink tube have high-rate shrinkage characteristics, so that the protection of more variable-diameter elements can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal hose technical field especially relates to a metal hose with double-layer film design. BACKGROUND

[0002] Metal hoses are widely used in liquid cooling equipment such as wind power generation equipment, energy storage equipment, data centers, etc. as connecting pipes between equipment. Metal hoses are mainly divided into threading metal hoses, corrugated metal hoses and plastic-coated metal hoses according to their purposes and structures. The commonly used one is corrugated metal hose, which is mainly composed of a corrugated pipe, a mesh cover and a connector. The corrugated pipe serves as a flexible part and is made of thin-walled stainless steel in the shape of a spiral or a ring. The mesh cover is woven by interlaced metal wires or metal strips, which has the functions of reinforcement and shielding.

[0003] Part of the wind power generation equipment is located in the marine environment, which requires very high corrosion resistance of the pipes. This puts forward more severe requirements for the corrosion resistance design of metal hoses. According to the combination form of the valve body, valve shaft seal and coupling of the regulating valve, there are currently several main corrosion resistance designs for metal hoses:

[0004] The first one is to use electroplating, spraying or chemical plating method for surface treatment, and to plate a layer of metal or alloy such as chromium, nickel, zinc, etc. or to spray a layer of corrosion-resistant paint or plastic to isolate the direct contact between the corrosion medium and the metal. However, the process is relatively complex, the thickness of the plating layer is limited, and the plating layer is prone to failure after long-term use.

[0005] The second one is to use metal materials with strong corrosion resistance, such as stainless steel, nickel alloy or titanium alloy, to enhance the corrosion resistance of the metal hose itself. However, the cost is relatively higher, and the weldability and processability are relatively poor compared with stainless steel. There are significant differences in melting point, thermal conductivity, specific heat capacity and linear expansion coefficient, etc.

[0006] The third one is to use EVA heat shrink tube to perform vacuum heat film treatment on the metal hose to enhance its corrosion resistance. However, the stainless steel parts can be directly welded and heat shrunk in a vacuum oven, which is relatively easier to process. The EVA material heat shrink tube is wear-resistant and corrosion-resistant, and still has relatively stable performance at high temperatures. However, the single-layer film still cannot meet the harsh use conditions of outdoor marine environment, etc. INVENTION CONTENTS

[0007] In view of the above problems in the prior art, the main purpose of the utility model is to provide a metal hose with double-layer film design.

[0008] The utility model discloses a technical scheme is such: a kind of metal hose with double-layer film design, including bellows, the outside of the bellows is provided with inner layer heat shrink tube, the inner layer heat shrink tube is adhered and is combined between bellows, the inner layer heat shrink tube is hot melt adhesive material, the both sides of the bellows are connected with transition joint by inner layer heat shrink tube, the outside of the bellows is provided with braided mesh cover, the braided mesh cover is woven by mutually crossing wire or metal band, the outside of the inner layer heat shrink tube is provided with outer layer heat shrink tube, the outside of the braided mesh cover is wrapped with outer layer heat shrink tube, the outer layer heat shrink tube is polyolefin insulation flame-retardant material, sheath is provided between the inner layer heat shrink tube and braided mesh cover, the inner layer heat shrink tube and outer layer heat shrink tube adopt vacuum heating process.

[0009] By adopting the above technical scheme, by the setting of the outer layer heat shrink tube of polyolefin, the overall insulation flame-retardant performance of the metal hose can be improved, and by the setting of the inner layer heat shrink tube of hot melt adhesive, mechanical strain can be buffered, and the bellows is completely adhered and combined, with strong sealing performance. By the cooperation of the inner layer heat shrink tube and the outer layer heat shrink tube, the effects of sealing, waterproofing, corrosion prevention, air leakage prevention and insulation protection can be achieved, and the inner layer heat shrink tube and the outer layer heat shrink tube have high shrinkage characteristics, which can meet the protection requirements of more variable-diameter elements.

[0010] As a preferred embodiment, the bellows is made of thin-walled stainless steel in spiral or ring shape.

[0011] By adopting the above technical scheme, by the setting of the bellows of stainless steel, the surface wear resistance and service life of the metal hose can be improved.

[0012] As a preferred embodiment, the surfaces of the braided mesh cover and the bellows are treated by film coating.

[0013] By adopting the above technical scheme, by the film coating design, the overall corrosion resistance and durability of the metal hose are better.

[0014] As a preferred embodiment, the transition joints are fixedly connected to the both sides of the bellows.

[0015] By adopting the above technical scheme, by the setting of the transition joints, important connection transition effects can be achieved.

[0016] As a preferred embodiment, the transition joints are fixedly connected to the both sides of the bellows.

[0017] By adopting the above technical scheme, by the setting of the joint body, the first connection flange and the transition joint can be connected.

[0018] As a preferred implementation, the first connecting flange is provided with a second connecting flange away from one side of the joint body, a plurality of connecting bolts are arranged between the first connecting flange and the second connecting flange, and the second connecting flange is connected with the first connecting flange through the connecting bolts.

[0019] By adopting the above technical scheme, the connection efficiency of the metal hose and the external pipeline can be improved, and the sealing performance of the connection part can be ensured through the cooperation of the first connecting flange, the second connecting flange and the connecting bolts.

[0020] Compared with the prior art, the advantages and positive effects of the utility model are that,

[0021] In the utility model, the outer layer heat shrink tube of polyolefin can improve the insulation and flame retardation of the metal hose as a whole, the inner layer heat shrink tube of hot melt adhesive can buffer mechanical strain and be completely adhered to the corrugated pipe, has strong sealing performance, the inner layer heat shrink tube and the outer layer heat shrink tube can be used in cooperation to play the roles of sealing, waterproofing, corrosion prevention, air leakage prevention and insulation protection, the inner layer heat shrink tube and the outer layer heat shrink tube have high shrinkage characteristics, can satisfy the protection of more variable diameter elements, and the vacuum heating process can reduce the cost and improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A front view of a metal hose with double-layer film design is provided for the utility model;

[0023] Figure 2 An internal structure schematic view of a metal hose with double-layer film design is provided for the utility model;

[0024] Figure 3 An internal structure schematic view of a metal hose with double-layer film design is provided for the utility model; Figure 2 An enlarged view of A in the middle.

[0025] Legend: 1, joint body; 2, transition joint; 3, corrugated pipe; 4, inner layer heat shrink tube; 5, braided mesh cover; 6, outer layer heat shrink tube; 7, sheath; 8, first connecting flange; 9, second connecting flange; 10, connecting bolt. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Refer toFigures 1-3 The utility model provides a metal hose with double-layer film design, which comprises a corrugated pipe 3, an inner layer heat shrink tube 4 arranged on the outer side of the corrugated pipe 3, the inner layer heat shrink tube 4 being adhered and combined with the corrugated pipe 3, the inner layer heat shrink tube 4 being a hot melt adhesive material, transition joints 2 connected to the corrugated pipe 3 through the inner layer heat shrink tube 4 on both sides of the corrugated pipe 3, a braided mesh sleeve 5 arranged on the outer side of the corrugated pipe 3, the braided mesh sleeve 5 being woven by metal wires or metal strips crossing each other, an outer layer heat shrink tube 6 arranged on the outer side of the inner layer heat shrink tube 4, the outer side of the braided mesh sleeve 5 being wrapped with the outer layer heat shrink tube 6, the outer layer heat shrink tube 6 being a polyolefin insulation and flame-retardant material, a sheath 7 arranged between the inner layer heat shrink tube 4 and the braided mesh sleeve 5, the inner layer heat shrink tube 4 and the outer layer heat shrink tube 6 being arranged by a vacuum heating process, the polyolefin outer layer heat shrink tube 6 being arranged, which can improve the overall insulation and flame-retardant performance of the metal hose, the inner layer heat shrink tube 4 being arranged by a hot melt adhesive, which can buffer mechanical strain and be completely adhered and combined with the corrugated pipe 3, has strong sealing performance, the inner layer heat shrink tube 4 and the outer layer heat shrink tube 6 being used in cooperation, which can play the roles of sealing, waterproofing, corrosion prevention, air leakage prevention and insulation protection, the inner layer heat shrink tube 4 and the outer layer heat shrink tube 6 having high shrinkage characteristics, which can meet the protection requirements of more variable diameter elements, and the vacuum heating process can reduce costs and improve production efficiency.

[0028] Specifically, the corrugated pipe 3 is made of spiral or annular wave-shaped thin-walled stainless steel, the surfaces of the braided mesh sleeve 5 and the corrugated pipe 3 are subjected to film coating treatment, the transition joints 2 are fixedly connected to both sides of the corrugated pipe 3, the corrugated pipe 3 made of stainless steel can improve the surface wear resistance and prolong the service life, and the film coating design can improve the overall corrosion resistance and durability of the metal hose.

[0029] Specifically, the transition joints 2 are fixedly connected to the joint bodies 1 away from the corrugated pipe 3, the joint bodies 1 are connected between the first connecting flanges 8 and the transition joints 2, the first connecting flanges 8 are fixedly connected to the joint bodies 1 away from the transition joints 2, the second connecting flanges 9 are arranged on the sides of the first connecting flanges 8 away from the joint bodies 1, a plurality of connecting bolts 10 are arranged between the first connecting flanges 8 and the second connecting flanges 9, the first connecting flanges 8, the second connecting flanges 9 and the connecting bolts 10 are used in cooperation, which can improve the connection efficiency of the metal hose and external pipelines and ensure the sealing performance of the connection part, so that liquid leakage during transportation is avoided, and the second connecting flanges 9 are connected to the first connecting flanges 8 through the connecting bolts 10.

[0030] Working principle: when the metal hose needs to be connected, the cooperation of the first connecting flange 8, the second connecting flange 9 and the connecting bolt 10 can improve the connection efficiency of the metal hose and the external pipeline, and can ensure the sealing of the connection of the two, and the setting of the stainless steel corrugated pipe 3 can improve the surface wear resistance and prolong the service life, the film design makes the overall corrosion resistance and durability of the metal hose better, the setting of the outer layer heat shrink tube 6 of polyolefin can improve the overall insulation and flame retardant performance of the metal hose, the setting of the inner layer heat shrink tube 4 of hot melt adhesive can buffer mechanical strain and completely adhere to the corrugated pipe 3, and the sealing performance is strong, the cooperation of the inner layer heat shrink tube 4 and the outer layer heat shrink tube 6 can play the role of sealing, waterproof, anticorrosion, air leakage prevention and insulation protection, and the inner layer heat shrink tube 4 and the outer layer heat shrink tube 6 have high shrinkage characteristics, which can meet the protection of more variable diameter elements.

[0031] In the description of the present application, it should be explained that, unless otherwise specified and limited, the terms "mounting", "provided with", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication between two elements, and those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0032] The above is only the preferred embodiment of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A metal flexible hose with a double-layer coating design, comprising a corrugated pipe (3), characterized in that: The corrugated pipe (3) is provided with an inner heat shrink tube (4) on the outside. The inner heat shrink tube (4) is bonded to the corrugated pipe (3). The inner heat shrink tube (4) is made of hot melt adhesive material. The two sides of the corrugated pipe (3) are connected by transition joints (2) through the inner heat shrink tube (4). The corrugated pipe (3) is provided with a braided mesh sleeve (5) on the outside. The braided mesh sleeve (5) is woven from intersecting metal wires or metal strips. An outer heat shrink tube (6) is provided on the outside of the inner heat shrink tube (4). The outer heat shrink tube (6) is wrapped around the outside of the braided mesh sleeve (5). The outer heat shrink tube (6) is made of polyolefin insulating and flame retardant material. A sheath (7) is provided between the inner heat shrink tube (4) and the braided mesh sleeve (5). The inner heat shrink tube (4) and the outer heat shrink tube (6) are connected by a vacuum heating process.

2. The metal flexible hose with a double-layer coating design according to claim 1, characterized in that: The bellows (3) is made of thin-walled stainless steel with a spiral or annular waveform.

3. A metal flexible hose with a double-layer coating design according to claim 1, characterized in that: The surfaces of the woven mesh sleeve (5) and the corrugated pipe (3) are both coated.

4. A metal flexible hose with a double-layer coating design according to claim 1, characterized in that: Both sides of the corrugated pipe (3) are fixedly connected to transition joints (2).

5. A metal flexible hose with a double-layer coating design according to claim 1, characterized in that: The transition joint (2) is fixedly connected to a joint body (1) on the side away from the bellows (3), and the joint body (1) is fixedly connected to a first connecting flange (8) on the side away from the transition joint (2).

6. A metal flexible hose with a double-layer coating design according to claim 5, characterized in that: A second connecting flange (9) is provided on the side of the first connecting flange (8) away from the joint body (1). A plurality of connecting bolts (10) are provided between the first connecting flange (8) and the second connecting flange (9). The second connecting flange (9) is connected to the first connecting flange (8) by the connecting bolts (10).

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